- The Number: 70% on a 50-Question Exam
- What 70% Means in Practice
- Format, Rules, and What You Can Bring
- What Must Be Done Before You Can Sit for the Exam
- Fees and Attempt Rules After a Miss
- Topics That Carry You Past the Line
- Scheduling Domains to Protect Your Score
- Numbers That Belong to Other Exams
- After You Pass: Affidavit, Conferral, and Recertification
- Frequently Asked Questions
- The IAAO Procedural Rules set a 70% passing requirement for the RES Master Examination.
- The Master Examination is 50 one-point multiple-choice questions in four hours, so 70% works out to 35 correct answers.
- Testing is closed book; only a stand-alone calculator with cleared stored formulas is allowed.
- The first Master attempt costs $245 for members and $395 for non-members; the second costs $195 and $295.
The Number: 70% on a 50-Question Exam
The Residential Evaluation Specialist (RES) designation, issued by the International Association of Assessing Officers (IAAO), ends with a final RES Master Examination. The passing standard is stated in the IAAO Procedural Rules: 70%. The rules set a straightforward percentage threshold, and the exam's structure makes the arithmetic simple.
According to IAAO's published proctoring procedures, the Master Examination contains 50 multiple-choice questions worth one point each, with four hours allowed. A 70% requirement on 50 equally weighted questions translates to 35 correct answers. That conversion is our own arithmetic from the published figures, but it follows directly from them: no partial credit, no weighted sections disclosed publicly, just 50 one-point items.
If you are still orienting yourself to the credential itself, our overview of what RES certification is covers the designation's purpose and place in IAAO's program. This article stays focused on the score, the format that produces it, and the rules that govern what happens if you fall short.
What 70% Means in Practice
Fifteen misses is your entire margin
On a 50-question exam, 35 correct answers is the line. That leaves a margin of 15 incorrect or unanswered items. Because the exam is multiple choice and each question is worth the same single point, there is no strategic reason to leave an item blank, and nothing in the published procedure describes a penalty for wrong answers. Treat every question as worth exactly one point and answer all 50.
What we can and cannot say about scoring
The public sources establish the 70% requirement and the one-point-per-question structure. They do not publish a Master-domain blueprint with percentage weights, and they do not publish a scaled-score conversion or a current content-outline effective year. Anyone quoting you exact domain percentages for the Master Examination is working from information we could not verify. Our guide to all six RES content areas explains how the curriculum subjects map to preparation, with the important caveat that those six headings are unweighted study subjects rather than an official exam blueprint.
Likewise, we have not verified a published pass rate. If you want to understand what is and is not known about outcomes, see our discussion in RES Pass Rate 2026: What the Data Shows rather than relying on figures passed around without a source.
Format, Rules, and What You Can Bring
The conditions under which you earn those 35 points are tightly controlled. From IAAO's published proctoring rules:
| Element | RES Master Examination |
|---|---|
| Question count | 50 multiple-choice questions |
| Point value | One point per question |
| Time allowed | Four hours |
| Passing requirement | 70% (35 of 50 correct) |
| Reference materials | None; closed book, no notes |
| Calculator | Stand-alone calculator permitted; proctor must verify stored formulas are cleared |
| Phones and other devices | Not permitted |
| Delivery | Paper examination materials with an IAAO-approved proctor |
Two points deserve emphasis. First, the published procedure describes paper materials and an IAAO-approved proctor. No named commercial testing vendor has been verified for this Master examination. The Professional Development Manual allows IAAO to authorize a remote proctoring service, but that permission does not identify an available commercial delivery provider for this exact exam, so do not assume you can book a remote sitting the way you would for other credentials. Confirm your arrangements directly with IAAO. Our page on RES exam dates and scheduling walks through what to check.
Second, the calculator rule is a practical trap. A stand-alone calculator is allowed, but the proctor must verify that any stored formulas are cleared. If you rely on a financial calculator with programmed functions for capitalization or discounting work, clear its memory before test day and expect the proctor to check. Practice the underlying math by hand so a cleared calculator is not a handicap.
What Must Be Done Before You Can Sit for the Exam
The passing score only matters once you are eligible to attempt the Master Examination. The RES designation requires several elements, drawn from the RES requirements page read with Procedural Rules sections 7.20 to 7.24:
- Good-standing RES candidacy
- At least three years of residential-property appraisal experience
- Required education
- An approved project route
- The final Master Examination
Education requirement
For candidacies beginning January 1, 2015 or later, the education requirement is an associate degree or higher, or high-school completion or equivalent plus an approved alternative. The alternatives are: at least 21 approved semester hours (or eligible CLEP equivalents) with grades of C or higher; seven years of verified appraisal or assessment-administration experience; or an approved 70-point combination of education and experience. These alternatives do not remove the separate three-year residential-appraisal experience requirement.
Project route
Before the Master Examination you must complete one of three routes: a qualifying residential narrative appraisal, a computer-assisted residential-group appraisal narrative, or the separate eight-hour residential case-study examination plus Course 201 Appraisal of Land.
One source conflict is worth flagging. The designation webpage and promotional pathway describe the individual narrative as single-family, while the Procedural Rules specify a one-to-four-unit residential property. The rules govern, and you should obtain IAAO approval for your selected project before investing effort in it.
The experience affidavit is submitted after passing and before conferral, not before the exam. For the full eligibility picture, see RES Requirements 2026.
Fees and Attempt Rules After a Miss
Master examination fees
The current IAAO Professional Designation Program Fee Schedule (copyright 2026) lists these Master examination fees, which apply to candidacies beginning in 2021 or later:
| Item | Member | Non-member |
|---|---|---|
| First Master attempt | $245 | $395 |
| Second Master attempt | $195 | $295 |
| Candidacy application | $145 | $225 |
| Optional first case-study attempt | $295 | $415 |
Required education, materials, report grading, and other route costs are additional. These amounts were verified against the current published fee sheet rather than assumed unchanged from earlier finance manuals. For the broader budget, see RES Certification Cost 2026.
Retake timing
The December 2025 Professional Development Manual allows a Master retake after 30 days following the first failure, and requires 180 days before subsequent attempts after the second failure. Master attempts may continue while the candidate remains eligible.
The fee schedule lists a lower second-attempt price, which makes the first sitting the most expensive. That is a financial reason to prepare thoroughly the first time, though the real cost of a miss is the waiting period: at minimum 30 days before your next opportunity, and 180 days if you have failed twice.
Topics That Carry You Past the Line
Because no public Master-domain percentages were verified, the best preparation map is the six core curriculum subjects drawn from IAAO Courses 101, 102, 300, and 311 and Workshops 151 and 171. Treat them as unweighted preparation subjects, not a guarantee of exhaustive coverage. For a deeper walkthrough, see RES Exam Domains 2026.
Domain 1: Fundamentals of Real Property Appraisal
The foundation for everything else. Expect the exam to test whether you can reason through the logic of valuation, not just recite definitions.
- The sales comparison and cost approaches as applied to residential property
- Highest and best use reasoning
- Adjustment logic and market-derived support for adjustments
Domain 2: Income Approach to Valuation
Numerical fluency pays off here, and the cleared-calculator rule means you should be comfortable with the mechanics.
- Relationships among income, capitalization rate, and value
- Gross income multipliers and their use in residential rental markets
- Reconstructing net operating income from income and expense data
Domain 3: Fundamentals of Mass Appraisal
This is where assessment-administration thinking diverges from single-property fee appraisal.
- How mass appraisal differs from single-property appraisal in scope and method
- Data collection, neighborhood delineation, and market analysis for groups of properties
- Ratio studies and measures of assessment level and uniformity
Domain 4: Real Property Modeling Concepts
Course 311's current title is Real Property Modeling Concepts; the requirements also recognize the former Residential Modeling Concepts title. Expect conceptual and interpretive questions on models.
- Multiple regression and what coefficients mean in a valuation model
- Model specification, calibration, and testing
- Evaluating whether model output is reliable and applying it to residential groups
Domain 5: Uniform Standards of Professional Appraisal Practice (National)
This domain follows the current workshop catalog's National title; the pathway labels the subject USPAP. Workshop 151 or approved USPAP education applies on the US route, while applicable jurisdictional standards or approved equivalents apply outside the US.
- Core USPAP rules and how they govern appraisal development and reporting
- Scope of work, credibility, and disclosure obligations
- Where mass appraisal intersects with the standards
Domain 6: IAAO Standards of Professional Practice and Ethics
These questions reward careful reading of what the standards actually require.
- IAAO's standards and the professional conduct expectations they set
- Ethics scenarios and the reasoning behind the correct response
For more on how each subject is built and what depth to aim for, our RES study guide and the one-page RES cheat sheet are good companions, particularly because you cannot bring notes into the room.
Scheduling Domains to Protect Your Score
Since the exam is closed book and 15 misses is your total margin, the aim is to eliminate any domain where you could lose a cluster of questions. This sequencing reflects how the subjects build on one another, not any official weighting:
Domains 1 and 2: Appraisal and Income Approach
- Rebuild the core valuation logic first, since later subjects assume it
- Drill income and capitalization relationships by hand with a cleared calculator
Domains 3 and 4: Mass Appraisal and Modeling
- Study ratio statistics and regression interpretation together, since modeling results are judged with mass appraisal measures
- These tend to be the most conceptually demanding; give them the most time
Domains 5 and 6: Standards and Ethics
- Review USPAP (or your jurisdictional equivalent) and IAAO standards for precise wording
- Run timed question sets to rehearse the four-hour pacing
Fifty questions in four hours is generous pacing, so time pressure is rarely the main risk. The more common risk is a domain you studied only lightly. Take full-length timed sets at our practice test site to find weak areas while you still have time to fix them, then revisit those domains specifically. If you want a sense of where candidates typically struggle, read How Hard Is the RES Exam?
Numbers That Belong to Other Exams
The acronym "RES" is shared by several unrelated credentials, and searching for passing-score information can surface figures from the wrong one. This article is about the Residential Evaluation Specialist designation from the International Association of Assessing Officers only. It is not Singapore's Real Estate Salesperson examination, and it is not the separate residential case-study examination or Workshop 851's practice case.
- Case-study examination: 100 multiple-choice questions, maximum of three attempts. Not the Master Examination.
- Workshop 851: an optional case-study review with seven review sections and an ungraded 50-question practice case. Not the Master blueprint, and its ungraded practice set does not predict your Master score.
- Other credentials using RES: any scoring scale, fee, or pass-rate statistic attached to a different certifying body does not apply here.
If you landed here while sorting out the terminology, what RES stands for clears up the naming.
After You Pass: Affidavit, Conferral, and Recertification
Passing at 70% does not by itself confer the designation. The experience affidavit is submitted after passing and before conferral, so confirm that your three years of residential-appraisal experience are documented and ready.
Once conferred, recertification requires 70 credit hours in a five-year cycle, including two hours of qualifying IAAO ethics education and, for US designees, at least 14 hours of standards education covering at least two different USPAP releases. Other jurisdictions require applicable local standards education. Manual and software-managed cycle start dates differ, so follow the assigned cycle in your own record. The fee schedule lists $170 member and $240 non-member annual dues for the first designation, with no separate recertification-processing charge; annual dues remain payable.
As for the payoff, no RES-specific salary estimate or demonstrated certification earnings premium was verified, so we do not quote one. Our pieces on RES earnings, whether the certification is worth it, and RES jobs discuss the professional context qualitatively, and RES training covers how candidates prepare for the education side.
Key Takeaway
Plan around 35 correct answers out of 50, but prepare as if every domain could cost you points. With no notes, no reference sheet, and a cleared calculator, your margin of 15 misses depends entirely on what you carry into the room. Confirm your proctoring arrangements and project approval with IAAO early, and treat the 30-day retake window as a safety net rather than a plan.
Frequently Asked Questions
The IAAO Procedural Rules establish a 70% passing requirement. Because the Master Examination has 50 one-point multiple-choice questions, that corresponds to 35 correct answers.
IAAO's proctoring procedure specifies 50 multiple-choice questions worth one point each and four hours. The case-study examination's 100 questions are a different exam and should not be confused with the Master Examination.
The exam is closed book with no reference materials or notes. A stand-alone calculator is permitted, but the proctor must verify that stored formulas are cleared. Phones and other unauthorized electronic devices are not allowed.
The December 2025 Professional Development Manual allows a retake after 30 days following the first failure and requires 180 days before subsequent attempts after the second failure. Master attempts may continue while you remain eligible; the case-study exam's three-attempt cap does not apply to the Master Examination.
The current IAAO fee schedule lists $245 for members and $395 for non-members on the first attempt, and $195 and $295 on the second. Education, materials, report grading, and other route costs are additional, as detailed in our cost breakdown.